Portable platform truck



FIG. 1 is a front, left and top side perspective view of a portable platform truck showing the new design;

FIG. 2 is a rear, right and bottom side perspective view of a portable platform truck thereof;

FIG. 3 is a front elevation view of a portable platform truck thereof;

FIG. 4 is a rear elevation view of a portable platform truck thereof;

FIG. 5 is a left side elevation view of a portable platform truck thereof;

FIG. 6 is a right side elevation view of a portable platform truck thereof;

FIG. 7 is a top plan view of a portable platform truck thereof; and,

FIG. 8 is a bottom plan view of a portable platform truck thereof.

The broken lines in the drawings depict portions of the portable platform truck and form no part of the claimed design. 

CLAIM The ornamental design for a portable platform truck, as shown and described. 